Power Supply; Fig. 25 Connections For System Voltage (Us) And Power Contacts (Up) - Beckhoff CX56 0 Series Manual

6.2

Power supply

Damage to the Embedded PCs
The Embedded PCs may be damaged during wiring.
• The cables for the power supply should only be connected in de-energized state.
The power supply terminal requires an external voltage source, which provides 24 V DC (-15 % / +20 %).
The power supply terminal must provide 4 A at 24 V, in order to ensure the operation of the embedded PC in
all situations.
The cabling of the Embedded PC in the control cabinet must be done in accordance with the standard EN
60204-1:2006 PELV = Protective Extra Low Voltage:
• The "PE" and "0 V" conductors of the voltage source for a basic CPU module must be on the same
potential (connected in the control cabinet).
• Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or a point of the
energy source for this circuit must be connected to the protective earth conductor system.
Connections
Fig. 25: Connections for system voltage (Us) and power contacts (Up)
No. Description
1 The upper spring-loaded terminals (Us) identified with "24 V" and "0 V" supply the
embedded PC and the terminal bus (data transmission via K-bus or E-bus).
2 The spring-loaded terminals (Up) identified as "+", "-" and "PE" supply the bus terminals
via the power contacts and the sensors or actuators connected to the bus terminals.
Fuse
• When dimensioning the fuse for the system voltage (Us), observe the maximum power consumption of
the embedded PC (see: Technical data)
• Protect the power contacts (Up) with a fuse with a max. rating of 10 A (slow-blow).
Interrupting/switching off the power supply
To switch off the embedded PC, do not disconnect the ground (0 V), because otherwise current may
continue to flow via the shielding, depending on the device, and damage the embedded PC or peripheral
devices.
Always disconnect the 24 V line. Devices connected to the embedded PC with their own power supply (e.g.
a panel) must have the same potential for "PE" and "0 V" as the embedded PC (no potential difference).
CX56x0
NOTICE
Version: 1.0
Commissioning
37